Stulz FLAIR series, Installation, Operation And Maintanance Manual

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FLAiR Series Installation, Operation & Maintenance Manual
(©Aug, 2007)
Air Technology Systems, Inc.
1-7
1.5.3 Blower(s)
FLAiR A/C units furnished with A-Tech 20 controllers
are equipped with direct drive centrifugal blower(s) with
forward curved blades. The quantity of blowers varies
depending upon the capacity of the A/C unit. Each
blower is contained in a double-width, double-inlet
housing and is dynamically and statically balanced to
minimize vibration. The blower motors are ODP
industrial duty and utilize permanently lubricated ball
bearings.
1.5.4 Heaters (Optional)
Optional heaters may be furnished for re-heating the
supply air, as required to offset the sensible cooling of
the system during the dehumidification cycle, and for
the automatic heating mode. As a standard, electric
resistance heating elements are factory installed in the
supply air stream after the cooling coil to heat the
supply air.
As an option, hot water re-heat may be selected.
(NOTE- Hot water re-heat is only available on
FLAiR
units equipped with the A-Tech 20 controller.) Hot
water heating coil(s) are factory installed in the supply
air stream after the cooling coils to heat the supply air.
A 2-way on/off valve is provided to control the flow of
hot water through the coils to maintain the correct re-
heat temperature.
A-TECH 20 CONTROLLER
OUTLET GRILLE
CENTRIFUGAL
BLOWER(S)
FILTERS- (CUT-AWAY TO
SHOW INTERNAL PARTS)
SMOKE DETECTOR
(OPTIONAL)
COMPRESSOR
T/H SENSOR
CONDENSATE PUMP
(OPTIONAL)
ELECTRICAL
COMPARTMENT
HUMIDIFIER
(OPTIONAL)
COIL(S)
TUBE-IN-TUBE
HEAT EXCHANGER COIL
(W/G UNITS ONLY)
NOTES:
1. SERVICE DISCONNECT SWITCH IS MOUNTED TO LEFT, FRONT DOOR OF CABINET.
2. CABINET DOORS ARE REMOVED TO SHOW INTERNAL PARTS.
FRONT
SERVICE
DISCONNECT SWITCH
(NOTES 1 & 2)
FIRESTAT
(OPTIONAL)
Figure 3- Typical Layout with A-Tech 20 Controller
1.5.5 Coil(s)
The cooling and optional hot water re-heating coils are
aluminum finned/copper tube construction and are
sized for the BTU capacity required by the application.
1.5.6 Temperature/Humidity Sensor
As a standard for room air control, a temperature/
humidity (T/H) sensor is factory mounted in the return air
stream. The T/H sensor monitors the return air conditions
and provides input signal(s) to the system controller to
manage the operation of the A/C unit, consistent with the
setpoints entered in the system controller.
1.5.7 Humidifier (Optional)
FLAiR precision A/C systems utilize an electrode,
steam cannister humidifier. The humidifier is factory
installed inside the air conditioner and includes fill and
drain valves and associated piping. Operation of the
humidifier’s fill and drain cycles is based on water
conductivity and is maintained by the humidifier
controller. An operating manual for the humidifier is
provided under separate cover. Refer to that manual for
detailed information on operation of the humidifier.
1.6 Optional Equipment
1.6.1 Condensate Pump
An optional condensate pump may be used for auto-
matic removal of condensate from the air conditioner
and flush water from the humidifier. An
internal overflow safety switch is wired
to the system controller to automati-
cally shut down the precision A/C
system should an overflow occur.
1.6.2 Smoke Detector
Optionally mounted in the return air
stream, a photo-electric smoke
detector is used to sense the pres-
ence of smoke and signal the control-
ler when a smoke alarm condition
exists.
1.6.3 Firestat
Optionally mounted in the return air
stream, a fire detector senses high
return air temperature and signals the
controller when a fire alarm condition
exists.